A modeling study of coastal circulation and landfast ice in the nearshore Beaufort and Chukchi seas using CIOM

This study investigates sea ice and ocean circulation using a 3‐D, 3.8 km CIOM (Coupled Ice‐Ocean Model) under daily atmospheric forcing for the period 1990–2008. The CIOM was validated using both in situ observations and satellite measurements. The CIOM successfully reproduces some observed dynamic...

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Bibliographic Details
Published in:	Journal of geophysical research. Oceans Vol. 119; no. 6; pp. 3285 - 3312
Main Authors:	Wang, Jia, Mizobata, Kohei, Bai, Xuezhi, Hu, Haoguo, Jin, Meibing, Yu, Yanling, Ikeda, Moto, Johnson, Walter, Perie, William, Fujisaki, Ayumi
Format:	Journal Article
Language:	English
Published:	Washington Blackwell Publishing Ltd 01-06-2014
Subjects:	Arctic Ocean Atmospheric forcing Beaufort Sea Channels Chukchi Sea Coastal Coastal currents Coastal waters coupled ice-ocean modeling dipole anomaly Eddies Geophysics Heat transport Inflow landfast ice Marine Meteorology Nearshore processes Ocean circulation Ocean models Oceans Sea ice Straits Three dimensional Water circulation Wind PNW, Beaufort Gyre INE, Bering Sea, Bering Strait Russia, Siberia INE, Chukchi Sea INE, USA, Alaska
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Summary:	This study investigates sea ice and ocean circulation using a 3‐D, 3.8 km CIOM (Coupled Ice‐Ocean Model) under daily atmospheric forcing for the period 1990–2008. The CIOM was validated using both in situ observations and satellite measurements. The CIOM successfully reproduces some observed dynamical processes in the region, including the Bering‐inflow‐originated coastal current that splits into three branches: Alaska Coastal Water (ACW), Central Channel branch, and Herald Valley branch. In addition, the Beaufort Slope Current (BSC), the Beaufort Gyre, the East Siberian Current (ESC), mesoscale eddies, and seasonal landfast ice are well simulated. The CIOM also reproduces reasonable interannual variability in sea ice, such as landfast ice, and anomalous open water (less sea ice) during the positive Dipole Anomaly (DA) years, vice versa during the negative DA years. Sensitivity experiments were conducted with regard to the impacts of the Bering Strait inflow (heat transport), onshore wind stress, and sea ice advection on sea ice change, in particular on the landfast ice. It is found that coastal landfast ice is controlled by the following processes: wind forcing, Bering Strait inflow, and sea ice dynamics. Key Points Modeling landfast ice and nearshore processes Reveal mesoscale eddies using a model and theory Nearshore sea ice responds to both +DA and −DA
Bibliography:	ark:/67375/WNG-GRP3549L-F NSF - No. ARC-0712673; No. ARC-0714078 ArticleID:JGRC20680 istex:1E2B34274964748A2BA44E1FED61DB539A073891 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2169-9275 2169-9291
DOI:	10.1002/2013JC009258